secretary to napolitano from earlier today. all of that hearing in our video library at c-span.org. we will take you to boston for a briefing from the fbi on the boston marathon bombing investigation. just ahead of that news conference, they announced they would release video and photographs of the investigation, so we will have live once it starts on c-span. the secretary, the the about the explosion at a fertilizer plant in the time of what -- in that town of west, texas, an explosion that killed 15 and injured as many as 160. >> i will begin with west, texas, as the more recent event, and give you the most current information that we have about the explosion, and of course, our sympathies and concerns go out to the families of those who have lost loved ones or who have had a loved one who has been injured. ghtthe faa has issued a temporary flight restriction over the area. the texas commission on environmental quality is providing air monitoring and technical assistance. the texas task force one has been alerted to provide structural collapse support. the union pacific railroad h